|I have an optiplex 320. windows XP does not come with sound drivers for the hardware, so you will need to get them here if you reinstalled windows: http://www.dell.com/support/drivers... |
remember: you need to select windows XP here even though it defaults to listing vista 32bit drivers. the drivers are under the 'audio' section.
on the other hand, if your sound suddenly stopped working, the problem could range from corrupt drivers all the way to a broken sound chip.
please remember to reply with results so we know whether a solution worked or not